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Light World Earthquakes Magnitude 4-4.9

Light earthquake: M4.8 quake has struck near Georgetown in Saint Helena

Posted by admin on October 17, 2018 0 Comments

Earthquake location -7.4841S, -12.5124WA light earthquake with magnitude 4.8 (ml/mb) was detected on Saturday, 215 km ENE of Georgetown, Saint Helena (134 miles). The earthquake occurred at a depth of 10 km (6 miles) below the earth’s surface. Exact location of earthquake, longitude -12.5124 West, latitude -7.4841 South, depth = 10 km. Global date and time of event UTC/GMT: 22/09/18 / 2018-09-22 03:57:40 / September 22, 2018 @ 3:57 am. A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). Event id: us1000h3pw. Ids that are associated to the earthquake: us1000h3pw. The 4.8-magnitude earthquake has occurred at 02:57:40 / 2:57 am (local time epicenter).

Earthquakes 4.0 to 5.0 are often felt, but only causes minor damage. In the past 24 hours, there have been five, in the last 10 days five, in the past 30 days six and in the last 365 days seven earthquakes of magnitude 3.0 or greater that have been detected nearby. Every year there are an estimated 13,000 light earthquakes in the world.

Did you feel anything?

Did objects rattle, topple over, or fall off shelves? Leave a comment or report about activity, shaking and damage at your home, country and city. Read more about the earthquake, Distances, Seismometer information, Date-Time, Parameters, Location and details about this quake, that has struck: 215 km ENE of Georgetown, Saint Helena. This data comes from the USGS Earthquake Notification Service.

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More information

Parameter Value Description
Magnitude 4.8 mb The magnitude for the event.
Longitude -12.5124° West Decimal degrees longitude. Negative values for western longitudes.
Latitude -7.4841° South Decimal degrees latitude. Negative values for southern latitudes.
Depth 10 km Depth of the event in kilometers.
Place 215km ENE of Georgetown, Saint Helena Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time 2018-09-22 03:57:40 Time when the event occurred. UTC/GMT
Updated 2018-10-17 04:20:12 Time when the event was most recently updated. UTC/GMT
Timezone offset -60 Timezone offset from UTC in minutes at the event epicenter.
Felt The total number of felt reports
CDI The maximum reported intensity for the event.
MMI The maximum estimated instrumental intensity for the event.
Alert Level The alert level from the PAGER earthquake impact scale. Green, Yellow, Orange or Red.
Review Status reviewed Indicates whether the event has been reviewed by a human.
Tsunami 0 This flag is set to "1" for large events in oceanic regions and "0" otherwise. The existence or value of this flag does not indicate if a tsunami actually did or will exist.
SIG 354 A number describing how significant the event is. Larger numbers indicate a more significant event.
Network us The ID of a data contributor. Identifies the network considered to be the preferred source of information for this event.
Sources ,us, A comma-separated list of network contributors.
Number of Stations Used The total number of Number of seismic stations which reported P- and S-arrival times for this earthquake.
Horizontal Distance 1.884 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.8 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 97 The largest azimuthal gap between azimuthally adjacent stations (in degrees).
Magnitude Type mb The method or algorithm used to calculate the preferred magnitude for the event.
Event Type earthquake Type of seismic event.
Event ID us1000h3pw Id of event.
Event Code 1000h3pw An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us1000h3pw, A comma-separated list of event ids that are associated to an event.

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